Printing-stamp



(No Model.) I

H. HOLT;

PRINTING STAMP.

Patented Mar. 2, 1886.

INVENTOR %nc #o-? ATTORNEYS UNITED STATES PATENT OFFICE.

HORACE HOLT, or BROOKLYN, NEW YORK, ASSIGNOR TO J. FRANK TENNEY,

OF CHICAGO, ILLINOIS.

PRlNTlNG-STAMP.

.SPECIEICATI ON forming part of Letters Patent No. 337,331, dated March2, 1886.

Application filed April 26, 1884. Serial No. 129,368. (No mo .el.)

accompanying drawings, forming part of this specification.

My present invention has relation to the class of hand printing-stampscommonly known as printing-wheels, in which the printing is effected bytype upon the periphery of a wheel moved by hand over the surface to beprinted and supplied with ink by rollers journaled in its supportingframe.

In this class of printing-stamps as at present usually made it iscustomary to provide a spring-pawl orlike device, by which the movementof the printing-wheel can be checked at the'end ofe'ach revolution, andwill remain checked-until the spring is released by the operator. It isalso customary to provide the journals of the inking-rollers withsprings which shall force these rollers against the type in order toapply the ink thereto.

My present invention has for itsobject to simplify and improve thisconstruction of printing-stamp, and to provide the printingwheel withmeans whereby its movement will be automatically locked at the end ofeach revolution, and will be automatically released when the wheel islifted from the printed sur face and applied to the surface on which thenew impression is to be made.

A further object of my invention is to so mount the printing-wheel inits frame that it will be brought into contact with the inkingrollerswithout the aid of springs.

To this end my invention consists, broadly, in providing theprinting-wheel with an automaticlocking device so arranged asto check orlock the wheel at the end of each complete revolution, and to release itagain when the wheel is lifted preparatory to making a new impression.

My invention also consists in loosely journaling the type-wheel beneathits inking-roll ers in such manner that during operationthe type willcontact with the rollers and receive the necessary ink.

In the accompanying drawings, Figure l is a View in side elevation of aprinting-wheel embodying my improvements. Fig. 2 is a viewinlongitudinal section on line a: a: of Fig. 3. Fig. 3 is a plan view.Fig. 4 is a view in side elevation of a somewhat modified construction.Fig. 5 is a View in longitudinal section through the journals of thetype-wheel and inking-rollers at the side of the frame opposite thatshown in Fig. 4. Fig. 6 represents a view in perspective of my stamp.

Referring to Figs. 1, 2, and 3, and to like parts shown in Figs. 4 and.5, A designates the main frame,to the rear plate of which is suitablyconnected the handle B,and within the obare movably held the journals 0of the typewheel 0, the periphery of which will carry the rubber type.

In the upper portion of-tlie main frame and above the printing-wheel arejournaled the inking-rollers D, the felt or other suitable covers ofwhich will be saturated with the printing-ink, and will contact with thetype long bearingslots a in the sides of this frame when the journals ofthe type-wheel are in the upper part of their bearing-slots a.

From one end of the wheel 0 projects the stop-pin cflwhich, when thewheel is in operation, travels over the enlargement or hub a of the mainframe, but which, when the type wheel has completed a revolution and islifted from the printed surface, drops into the seat a of the hub a, andchecks the further movement of the wheel until it is again placed uponthe surface in position to make a new impression.

Upon the journal-pin d of one of the inkingrollers, and between the endof this rollerand the main frame,is pivotally held the swinging pawl ordog E. One end, 6, of this pawl depends a sufficient distance to bestruck by and arrest the movement of the stop-pin 0 when the journals ofthe type-wheel are in the upper part of the bearing-slots a, and the end0 of the pawl is provided with the long slot e to receive the ink-rollerjournal d,and is of sufficient weight to retain the end eof the pawlinthe position shown by dotted lines in Fig. 1 until it is struck by thestop-pin c and raised to the position shown in Fig. 2. A suitable markmay be made on the end of the wheel,

which will serve to indicate the position of the type thereon, and isthe starting-point.

From the foregoing descriptionthe operation of this form ofprinting-wheel will be seen to be as follows: Assume the parts to be inthe position to begin the printing operation, as shown in Fig. 1, thetype-wheel will then rest upon the surface to be printed,its movablejournals being in the upper part of the slots a, and the pin 0 beingraised from the seat a and in front of the end 6 of the pawl E. By nowpushing the wheelover the surface the printing will be effected, andbefore the revolu: tion of the wheel is completed the type will havepassed against the ink-rollers D and reeeived ink therefrom for the nextimpression. At the end of the revolution the stop'pin 0 will strike theend 6 of the swinging pawl E, lifting this pawl into the position shownby full lines-in Fig. 2, and having its further movement arrestedthereby. 1f the typewheel be now lifted from the printed surface, thejournal-pins will pass to the bottoms ,of the slots at, the heavier endof the pawl E will drop, thereby throwing the end 0 back of the stop-pinc, and the pawl will close to lock the wheel. It will be seen that theend e of the pawl E extends so near the hub a that the stop-pin 0 cannotpass between the two, and any backward movement of the type-wheel willtherefore be guarded against.

The construction shown in Figs. 4 and 5 does not differ essentially fromthat already described. A stop-arm, c, on the end of the .0 journal ofthe type-wheel takes the place of the stop-pin above described, and bothit and the pawl E are upon the outside of the main frame. In thisconstruction, also, a supple- By my present improvements the use of allsprings to check the type-wheel or apply the ink-rollers is avoided, anautomatic locking and releasing of the type-wheel is secured, and, inshort, a most simple, cheap, durable, and effective printing-wheel isobtained.

It will be readily understood that the details of construction may bevaried somewhat without departing from the scope of the invention.So,also,if desired, the main frame of the stamp maybe made with acovered top and with a hinged or sliding bottom, in order to protect itfrom dust or prevent its soiling objects when not in use.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is r 1. In a printing-stamp, the combinationof the movably-journaled printing-wheel, a pawl to arrest the movementof said wheel, and a pin or arm connected with said wheel for engagementwith said pawl, substantially as described.

2. In a printing-stamp, the combination, with the loosely-journaledtype-wheel, of the inking-rollers above said type-wheel andin positionto contact therewith when the typewheel is in operation,substantiall yas set forth.

3. In a printing-stamp, the combination, with the main frame having theseat a, of the type-wheel loosely journale'd in said frame and providedwith a pin to drop into said seat, substantially as set forth.

4. [n a printing-stamp, the combination of 8c the main frame A, havingoblong slots dand seat a, the type-wheel 0, having stop-pin 'c andloosely journaled in the main frame, the gravitating pawl E, and theinking-rollers D, all substantially. as and for the purposes set 85forth.

In testimony whereof I have hereunto set my hand this 16th day of April,1884. m

HORACE HOLT.

Witnessesy J N G.- HOLT,

W. J. Hmififlii;

